package org.example.security;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import lombok.RequiredArgsConstructor;
import org.example.entity.Menu;
import org.example.entity.Role;
import org.example.entity.User;
import org.example.service.IMenuService;
import org.example.service.IRoleService;
import org.example.service.IUserService;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

@Service("userDetailsServiceImpl")
@RequiredArgsConstructor
public class UserDetailsServiceImpl implements UserDetailsService {
    private final IUserService userService;
    private final IRoleService roleService;
    private final IMenuService menuService;
    // 登录调用的方法
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 1.
        User user = userService.getOne(Wrappers.lambdaQuery(User.class).eq(User::getUserName, username));
        if (user == null) throw new UsernameNotFoundException("用户不存在");
        // 2. 获取用户所有的角色列表
        List<Role> roleList = roleService.listByUserId(user.getUserId());
        // 3. 根据角色获取所有菜单
        List<Menu> menuList = menuService.listByRoleIds(roleList.stream().mapToLong(Role::getRoleId).boxed().toArray(Long[]::new));

        Set<String> roleNames = roleList.stream().map(Role::getRoleKey).collect(Collectors.toSet());
        Set<String> perms = menuList.stream()
                .filter(menu -> StringUtils.hasText(menu.getPerms()))
                .map(Menu::getPerms).collect(Collectors.toSet());
        UserDetailsImpl userDetails = new UserDetailsImpl();

        userDetails.setRoleKeySet(roleNames);
        userDetails.setPermsSet(perms);
        userDetails.setUsername(user.getUserName());
        userDetails.setPassword(user.getPassword());
        userDetails.setStatus(user.getStatus());
        userDetails.setUser(user);

        return userDetails;
    }
}
